Questions surround Lukoil's ability to recover from drone strikes on its refineries, while Gazprom Neft managed a slight production increase but likewise has downstream woes.

Russia's NORSI refinery has halted crude oil processing after a Ukrainian drone strike damaged several units and infrastructure, Reuters reports.

All major Lukoil refineries in Russia are now offline, Reuters reported on Aug. 26, following Ukraine's latest overnight attack on the NORSI plant in Nizhny Novgorod.